Systems of Equations by Elimination Addition Subtraction

Solve the following using elimination.
-9x-4y=-20
5x+4y=4

• (-4,4)

• (4,4)

• (4,-4)

• (-4,-4)

Solve for x and solve for y
3x  - 3y = 33
x - y = 11

• no solution

• infinitely many solutions

• (11, 0)

• (-11, 22)

What do you call "more than one equation"?

• equivalent

• algebraic expression

• System of equations

• System of inequalities

How do you solve a system of equations?

(CLICK ALL THAT APPLY)

• graphing

• elimination

• substitution

• nSolve

• linSolve

Which method would be best for solving the system shown? 3x+y=10 x-y=5

• Substitution

• Elimination by addition

• Elimination by subtraction

What is the solution?

• (1, -1)

• (-1, 1)

• (0, -2)

• (0, 1)

How many solutions does this system of equations have?

• One Solution

• No solution

• Infinitely Many Solutions

• Two Solutions

If a system of linear equations has one solution, what does this mean about the two lines?

• Parallel lines

• the same line

• Intersecting lines

Determine if (4, 1) is a solution for the system of equations.
y = -x + 5
y = 2x - 7

• yes

• no

Which method would be best for solving the system shown?

9x - 4y = 12

9x + y = 1

• Substitution

• Elimination by addition

• Elimination by subtraction